Chris, the single can be upgraded to a dual, pretty cool.
Alden, what is your bed length? I have a quad cab Dakota and from the front wall of the bed to the rear of the dropped gate is less than 7'. Our bikes are a little over 8'. If you have the short bed like mine, where does the rear tire come to?
Don, there is no question about a spare tire. I've run boat trailers forever and got stuck once because my spare was in the garage instead of in the back of truck. Hard lesson that time, never to be repeated!!
"Never underestimate the power of human stupidity" - Robert Heinlein